EP4292688A1 - Hydrocyclon permettant de séparer des solides et/ou des liquides à partir d'un écoulement gazeux de processus - Google Patents

Hydrocyclon permettant de séparer des solides et/ou des liquides à partir d'un écoulement gazeux de processus Download PDF

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Publication number
EP4292688A1
EP4292688A1 EP22178979.5A EP22178979A EP4292688A1 EP 4292688 A1 EP4292688 A1 EP 4292688A1 EP 22178979 A EP22178979 A EP 22178979A EP 4292688 A1 EP4292688 A1 EP 4292688A1
Authority
EP
European Patent Office
Prior art keywords
hydrocyclone
process space
section
guide means
stream
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22178979.5A
Other languages
German (de)
English (en)
Inventor
Michael Novosel
Maik Herrmann
Johann Paul Hahn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Esta Apparatebau GmbH and Co KG
Original Assignee
Esta Apparatebau GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Esta Apparatebau GmbH and Co KG filed Critical Esta Apparatebau GmbH and Co KG
Priority to EP22178979.5A priority Critical patent/EP4292688A1/fr
Priority to PCT/EP2023/065650 priority patent/WO2023242120A1/fr
Publication of EP4292688A1 publication Critical patent/EP4292688A1/fr
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/06—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath

Definitions

  • the present invention relates to a hydrocyclone for separating solids and/or liquids from a gaseous process stream.
  • the present invention further relates to a hydrocyclone arrangement with such a hydrocyclone and with a process liquid trough.
  • hydrocyclones which are basically known from the prior art, a gaseous process stream is guided along a helical trajectory in order to carry solid particles and/or liquid droplets contained in the gas stream radially outwards.
  • a process liquid is introduced into the process stream or in certain areas of the hydrocyclone in order to bind the solid particles and/or liquid droplets for easier separation and/or to agglomerate them for better separation.
  • the process liquid is whirled up by the process stream or is sprayed into a hydrocyclone designed as a cyclone scrubber.
  • the object is achieved by a hydrocyclone for separating solids and/or liquids from a gaseous process stream, a process space formed by a peripheral wall and cylindrical in a first process space section, an axial direction of the process space extending vertically and a lower area of the process space for filling with a process liquid to a filling level is provided, an inlet connection which breaks through the peripheral wall in the lower region of the process space for admitting the process stream in the circumferential direction of the process space, an outlet arranged at an upper end of the process space for leading out the process stream, and an outlet which is coaxial with the peripheral wall in the process space extending guide means for guiding the process stream in a helical shape between the inlet port and the outlet.
  • a hydrocyclone is understood to be a device in which, by guiding a mainly gaseous process stream along a helical trajectory, a separating force is generated on solids and/or liquids contained in the process stream and the solids or liquids are separated. The separation takes place by radially discharging the solid and/or the liquid. The solid and/or the liquid are brought into contact with a process liquid such as water in order to bind solid particles and/or liquid droplets and/or to agglomerate them by centrifugal forces for better separation.
  • a helix shape is also and in particular understood to mean a helix shape with an outer diameter that tapers at least in some areas.
  • a hydrocyclone for example, dust, chips and/or abrasion as well as lubricant or coolant droplets, for example from a mechanical processing process, can be separated from a gaseous process stream such as an air or protective gas stream.
  • the hydrocyclone is also used with flammable or explosive solids and/or liquids in the process stream in order to reduce the risk of fire or explosion compared to a separator without process liquid.
  • the flowing fluid located at a respective point of the hydrocyclone is referred to as a process stream, regardless of whether only the gas itself or solids and/or liquids, in particular process liquid, are contained in the process stream at this point.
  • the respective one The composition of the process stream results from the context along its trajectory in the hydrocyclone. Insofar as the process stream is referred to as gaseous, this refers to a completely cleaned process stream and is not to be understood as limiting with regard to loading with solids and/or liquids, in particular the process liquid.
  • a circumferential wall is understood to be a wall that forms a geometric envelope of such a helical shape.
  • the circumferential wall is cylindrical in the first process space section, i.e. has a round cross section and defines a cylindrical coordinate system with an axial direction, a radial direction and a circumferential direction.
  • the hydrocyclone's essential components are constructed coaxially around this cylindrical coordinate system.
  • an inlet port To the extent that an inlet port is arranged in the lower region of the process space, it has no distance to a lower end of the first process space section or only a small distance compared to the entire axial extent of the first process space section.
  • an intended filling level of the process liquid lies within the axial extent of the inlet connection, so that process liquid filled into the first process space section is also in the inlet connection.
  • a process flow supply to the inlet connection then preferably takes place from above, so that no process liquid can reach components of a system upstream of the hydrocyclone.
  • an intended filling level preferably has a ratio to the axial length of the first process space section of between 0.3 and 0.6, preferably between 0.4 and 0.5 and in particular of 0.45.
  • the first aspect of the invention includes the teaching that the process stream entering the process space swirls up process liquid filled in the lower region of the process space, so that the process liquid is arranged essentially radially on the outside in the process space
  • Process liquid veil forms.
  • the process liquid forms a veil with a parabolic cross-section and a central axis arranged coaxially to the axial direction.
  • Solid particles and/or liquid drops contained in the process stream are then carried radially outwards in the helical trajectory that the process stream occupies in the process space and at the latest there come into contact with the process liquid veil, so that solid particles and/or liquid drops are bound and/or in the process liquid. or be agglomerated by centrifugal forces for better separation.
  • the conductive means extends into the lower region of the process space and is immersed in the process liquid filled in the process space.
  • the guide means preferably extends axially to a lower end of the first process space section. On the other hand, the guide means preferably extends axially to an upper end of the process space.
  • the cross section of the first process space section is restricted from a circular shape to a circular ring shape where the guide means extends and is thus restricted and reduced to the area that is actually occupied by the helical trajectory.
  • the surface of the process liquid is also limited from a circular shape to a circular ring shape.
  • a reduced pressure loss is also achieved by whirling up the process liquid to form the process liquid veil, in that the turbulence in the process liquid is reduced compared to a hydrocyclone without conductive means.
  • the necessary amount of process liquid that has to be filled into the hydrocyclone is also reduced.
  • the conductive means surprisingly achieves a significantly increased degree of separation, with an increased degree of separation also being achieved over an increased range of volume flows.
  • the hydrocyclone therefore maintains a high degree of separation and a low pressure loss even in the event of changes or fluctuations in the volume flow of the process stream, whereby the breakdown, i.e. the amount of solid and/or liquid that passes through the hydrocyclone, is reduced compared to a hydrocyclone without a conductive agent.
  • a separation efficiency of greater than 90% can be achieved.
  • the guide means is preferably cylindrical at least in sections, but it can also have other, in particular several different, cross-sectional geometries. Insofar as the guide means is cylindrical, it preferably has a diameter which has a ratio of between 0.2 and 0.8, preferably between 0.3 and 0.7, particularly preferably between 0.4 and 0, to the diameter of the peripheral wall. 6 and in particular 0.5.
  • the first process space section is adjoined at the top by a second process space section formed by a circumferential wall section converging towards the outlet.
  • the trajectory of the process flow is then brought together conically in the second process space section, with the process liquid veil drawn along the radial outside of the helix trajectory being braked on the conical peripheral wall section and as a result at least partially falling out of the flow and flowing back along the peripheral wall into the lower region of the process space .
  • the process liquid is separated from the process stream again and remains in the hydrocyclone.
  • the diameter then preferably points through the conical peripheral wall section formed outlet to the diameter of the first process space section a ratio between 0.4 and 0.8, particularly preferably between 0.5 and 0.7 and in particular from 0.6.
  • the guide means preferably extends over the entire axial length of the first process space section.
  • the guide means also extends over the entire axial length of the second process space section. In this way, the helical trajectory is guided over the entire process space, so that the hydrocyclone has a particularly low pressure loss.
  • the guide means has a guide means section that converges conically upwards at an upper end.
  • a guide means section corresponds to the conically converging peripheral wall section, so that the clear cross section of the second process space section is not or only slightly changed compared to the clear cross section of the first process space section.
  • the conically converging guide means section and the conically converging peripheral wall section run parallel to one another.
  • the conically converging guide means section extends axially over the entire axial length of the second process space section.
  • the hydrocyclone has a roof element arranged above the outlet for deflecting the process flow downwards, the roof element being pot-shaped with a base and a cylindrical side wall extending downwards from the base.
  • the process stream emerging from the outlet essentially upwards then flows towards the bottom of the roof element and is inevitably diverted downwards there.
  • the process stream then escapes from the roof element in a gap between the side wall and the peripheral wall, with a gap surface normal preferably having a substantially radial orientation.
  • the flow in the gap has a downward flow direction component.
  • the process stream is then diverted upwards immediately after emerging from the gap.
  • the roof element and the first process space section are arranged spaced apart from one another in the axial direction through the gap.
  • the roof element and the second process space section are preferably arranged spaced apart from one another in the axial direction through the gap.
  • the gap and the second process space section overlap at least partially in the axial direction.
  • a guide surface for the process stream is then formed at the gap through an outer side of the conical peripheral wall section, the orientation of which corresponds obliquely downwards to the desired flow direction of the process stream at the exit from the gap.
  • the flow can then also develop in the area of the gap with a particularly low pressure loss.
  • the height of the gap preferably points to the axial length of the first process space section has a ratio between 0.1 and 0.5, preferably between 0.2 and 0.4 and in particular 0.3.
  • the bottom of the roof element is also preferably designed to taper towards the top.
  • the process flow emerging from the outlet is then redirected in an obliquely downward direction, which corresponds to the desired flow direction at the gap. No further deflection between the roof element and the gap is necessary, so that overall a low pressure loss is achieved.
  • the side wall also has a collar for guiding the process flow when it is deflected upwards when it exits the roof element.
  • the part of the process stream that is suddenly deflected upwards can then flow along the collar with little turbulence and therefore with little pressure loss.
  • the roof element is preferably held on the guide means by means of a fastening means.
  • the fastening means then preferably extends coaxially with the guide means and therefore in the middle of the helical flow trajectory.
  • the fastening means is therefore not arranged in a direct flow path of the process stream and therefore does not contribute to a further pressure loss in the process stream.
  • the fastening means creates an overall compact hydrocyclone.
  • the aforementioned configuration creates an easily dismantled hydrocyclone, in which the roof element can be removed by detaching it from the fastening means and sufficient access to the process spaces is created through the then exposed outlet.
  • the conically converging peripheral wall section can also be designed to be easily removable.
  • the hydrocyclone is therefore particularly easy to access for cleaning. In particular, emptying the process liquid from the first process space section for cleaning is not absolutely necessary, but is still possible.
  • the guide means is designed to be variable in cross section at least over part of its axial extent. This means that the size of the cross-sectional area of the guide means can be changed, for example while the geometry remains the same, that the geometry itself can be changed, or that a cross section of the guide means can be shifted, for example, transversely to the axial direction.
  • the guide means can be adapted to a respective process stream in such a way that the operating parameters are optimized for this process stream. For example, the best possible ratio can be set between a low pressure loss and a high separation efficiency. In this way, the hydrocyclone can be used for a variety of process streams.
  • the cross section can be tracked during operation by a control or regulation to a process stream that changes in at least one property.
  • the process stream can change in its volume flow, its mass flow or in its composition, in particular with regard to solids or liquid loading.
  • the properties of the process stream are then detected and evaluated using sensors, for example, whereby an ideal conductive cross section is calculated using data processing centers and is set on the conductive means using control means.
  • the guide tube is designed to be elastic, with an interior of the guide tube being designed to be variable in volume in order to change the cross section of the guide tube.
  • the hydrocyclone can alternatively also have means for compressing and/or stretching the conductive means in order to change the cross section of the conductive means.
  • At least one wall section of the peripheral wall has a sufficiently small modulus of elasticity to avoid adhesion to the wall section by means of elastic deformation of the wall section.
  • Under a Avoiding adhesions means both preventing solids and/or liquids from adhering and also removing existing adhesions. Adhesion arises, for example, because solids and/or liquids, in particular solid agglomerates generated by the process liquid, are held mechanically or because there is another binding force between solids and/or liquids and the peripheral wall, for example an electrostatic, magnetic or chemical binding force.
  • the peripheral wall therefore has a combination of material and geometry, which allows the wall section to be elastically deformed without experiencing damage, in particular without experiencing plastic deformation.
  • a deformation is possible to an extent that allows adhesions on an inside of the wall section to be removed.
  • a relative movement is generated between the wall section and the adhesion, by means of which a binding force between the adhesion and the wall section is dissolved or superimposed.
  • adhesions are accelerated away from the wall section during the deformation.
  • the relative movement can also be designed in such a way that adhesion to the wall section is made difficult or impossible, for example by periodically deforming the wall section at a sufficiently high frequency.
  • the wall section can be deformed from the outside, for example at certain regular intervals.
  • the hydrocyclone can be deformed manually from the outside, but appropriate means, in particular automated means, can preferably be provided for this purpose.
  • a Deforming the wall section advantageously makes it possible to avoid adhesions in a very simple manner.
  • an elastically designed wall section results in reduced noise emissions during operation of the hydrocyclone.
  • an inside of the peripheral wall facing one or both of the process spaces is at least partially designed to be electrically conductive and grounded. This prevents electrically charged solid particles from adhering to the wall section due to their charge and/or potential differences. In the case of a wall section made of plastic, these properties can be achieved, for example, by a coating.
  • the object is achieved by a hydrocyclone arrangement with a hydrocyclone according to the first aspect of the invention and with a process liquid trough, the hydrocyclone being open at a lower end of the process space and arranged upright in the process liquid trough.
  • the hydrocyclone arrangement With the hydrocyclone arrangement, the advantages described above with regard to the first aspect of the invention can essentially be achieved.
  • the hydrocyclone arrangement has a high degree of separation and a low pressure loss.
  • the trough preferably extends radially outwards beyond the peripheral wall and in this respect forms a projection to the hydrocyclone.
  • process liquid emerging from the gap also returns to the trough, for example in free fall or along the outside of the peripheral wall.
  • a circumferential trough wall extends upwards at radially outer ends and thus forms a housing around the hydrocyclone. The process liquid is then particularly advantageously held within the housing thus formed and safely returned to the tub.
  • a discharge in particular a suction, for discharging the process stream is arranged above the roof element.
  • a housing formed by the trough wall can also extend horizontally above the hydrocyclone with a housing cover, the housing cover being pierced by a discharge connection, in particular a suction connection.
  • the process stream emerging from the gap is then suddenly deflected upwards immediately outside the gap, i.e. outside the hydrocyclone, and the solids and/or liquids therein are separated as described above.
  • the hydrocyclone arrangement then has a particularly high degree of separation, with process liquid also being safely separated again from the process stream.
  • Components of a system downstream of the hydrocyclone arrangement are then not reached by solids and/or liquids, in particular the process liquid.
  • the housing has a housing cover, the hydrocyclone is completely enclosed and it is completely prevented that liquids in particular get into the environment of the hydrocyclone arrangement.
  • the hydrocyclone arrangement has a plurality of hydrocyclones, with the plurality of hydrocyclones being arranged in the same process liquid trough or the same housing. In this way, the volume flow can be increased compared to a hydrocyclone arrangement with only one hydrocyclone, in particular without increasing the differential pressure.
  • the hydrocyclone arrangement can be easily scaled by connecting any number of hydrocyclones in parallel. Several hydrocyclone arrangements with their own process liquid troughs or housings can also be operated in parallel to one another with the same effect.
  • Figure 1 shows a hydrocyclone 1 according to the first aspect of the invention with a peripheral wall 2, a process space 3 being enclosed by the peripheral wall 2.
  • the process space 3 spans a cylindrical coordinate system around its central axis AX with an axial direction A, a radial direction R and a circumferential direction (not shown), the axial direction A being oriented vertically.
  • the process room 3 continues to point a cylindrically designed first process space section 3.1 and a conically shaped second process space section 3.2 adjoining it at the top, the first process space section 3.1 extending over a first axial length 4.1 and the second process space section 3.2 extending over a second axial length 4.2.
  • the second process space section 3.2 is therefore formed by a conically converging peripheral wall section 2.1.
  • the process space 3 also has a lower end 5.1 and an upper end 5.2, with an outlet 6 being arranged at the upper end 5.2.
  • the peripheral wall 2 is broken through by an inlet connection 8.
  • a guide means 10 is arranged in the process space 3, which is cylindrical in the first process space section 3.1 and has a conically converging guide means section 10.1 in the second process space section 3.2.
  • the guide means 10 is therefore formed in the entire process space 3 parallel to the peripheral wall 2 and serves to guide a helical flow of a process stream entering the process space 3 through the inlet port 8, as described below with regard to Figure 2 described in more detail.
  • a roof element 13 is arranged, which is held on the guide means 10 by means of a fastening means 14. More precisely, the roof element 13 is held on the fastening means 14 by means of screw nuts 14.1.
  • the roof element 13 has a base 13.1 and a downwardly extending cylindrical side wall 13.2 and is therefore designed as a pot-shaped overall.
  • the bottom 13.1 is designed to taper towards the top.
  • the roof element 13 has a collar 13.3 on the side wall 13.2.
  • the roof element 13 forms a gap S with the peripheral wall 2, which extends in the axial region of the second process space section 3.2.
  • the second process space section 3.2 therefore projects into the roof element 13.
  • a surface normal of the gap S is oriented radially outwards.
  • Figure 2 shows a hydrocyclone arrangement 15 according to the second aspect of the invention and also the flow conditions prevailing in the hydrocyclone 1 or the hydrocyclone arrangement 15, based on which the function of the hydrocyclone 1 or the hydrocyclone arrangement 15 is explained in more detail.
  • the hydrocyclone arrangement 15 includes a hydrocyclone 1 which has already been described above and will not be described again.
  • the hydrocyclone arrangement 15 further comprises a process liquid trough 16, from which a trough wall 17 extends upwards.
  • the process liquid tub 16, the tub wall 17 and a housing cover 18 provided at the upper end of the tub wall 17 together form a housing 19.
  • a discharge 20 is embedded in the housing cover 18, which can in particular be designed as a suction.
  • a process flow supply 21 is provided, which supplies the inlet port 7 with a process flow from above.
  • the process space 3 is designed to be open at its lower end 5.1 and stands in the process liquid trough 16.
  • the process liquid trough 16 and thus also the process space 3 are filled up to a filling level 25 with a process liquid 27, in particular water.
  • the fill level 25 extends up to a certain height of the inlet port 8, so that the process liquid 27 partially covers the inlet port 8.
  • the process stream 26 from the process liquid 27 swirls up a process liquid veil 27.1 which is parabolic in the first process space section 3.1.
  • the process liquid curtain 27.1 is then located radially on the outside of the process space 3 and serves to ensure that solids and/or liquids contained in the process stream 26 are contained in the Process space 3 is carried radially outwards by centrifugal force, comes into contact with the process liquid 27 in order to be bound and/or agglomerated.
  • both the helical trajectory of the process stream 26 and the process liquid curtain 27.1 are narrowed in the conically converging peripheral wall 2.
  • Part of the process liquid 27 is already separated from the process stream 26 and runs along the inside of the peripheral wall 2 back into the process liquid trough 16.
  • the process stream 26 and the remaining process liquid 27 emerge from the outlet 6, oriented primarily upwards, and hit the bottom 13.1 of the roof element 13. There they are each deflected downwards and then flow to the gap S.
  • the process stream becomes at the gap S 26 is suddenly deflected upwards to the discharge 20 and guided through the collar 13.3 to avoid turbulence.
  • the process liquid 27 cannot follow this deflection and therefore leaves the gap S facing downwards.
  • the process liquid 27 forms a further process liquid veil 27.2 in the gap S, through which the process stream 26 flows transversely, so that solids and/or liquids still contained in the process stream 26 are bound to the process liquid veil 27.2.
  • Figure 3 shows the hydrocyclone 1 again in a perspective view from the outside, the elements of the hydrocyclone 1 shown already resulting from what has been described above and therefore not being described again.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cyclones (AREA)
EP22178979.5A 2022-06-14 2022-06-14 Hydrocyclon permettant de séparer des solides et/ou des liquides à partir d'un écoulement gazeux de processus Pending EP4292688A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22178979.5A EP4292688A1 (fr) 2022-06-14 2022-06-14 Hydrocyclon permettant de séparer des solides et/ou des liquides à partir d'un écoulement gazeux de processus
PCT/EP2023/065650 WO2023242120A1 (fr) 2022-06-14 2023-06-12 Hydrocyclone pour séparer des solides et/ou des liquides d'un flux de traitement gazeux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22178979.5A EP4292688A1 (fr) 2022-06-14 2022-06-14 Hydrocyclon permettant de séparer des solides et/ou des liquides à partir d'un écoulement gazeux de processus

Publications (1)

Publication Number Publication Date
EP4292688A1 true EP4292688A1 (fr) 2023-12-20

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EP22178979.5A Pending EP4292688A1 (fr) 2022-06-14 2022-06-14 Hydrocyclon permettant de séparer des solides et/ou des liquides à partir d'un écoulement gazeux de processus

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EP (1) EP4292688A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5908493A (en) * 1997-11-17 1999-06-01 Krymsky; Mark D. Filtering system for cleaning air
WO1999051324A2 (fr) * 1998-04-02 1999-10-14 Luterek, Janusz, Franciszek Installation d'epuration de gaz
EP2742987A1 (fr) * 2012-12-14 2014-06-18 Team Kantola Service Oy Dispositif de nettoyage d'une canalisation d'air d'échappement et unité de séparation de poussière pour un réseau de gaines d'air d'échappement
CN111330396A (zh) * 2020-03-14 2020-06-26 安徽恒顺生产力促进中心有限公司 一种高效烟气净化除尘装置及其工作方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5908493A (en) * 1997-11-17 1999-06-01 Krymsky; Mark D. Filtering system for cleaning air
WO1999051324A2 (fr) * 1998-04-02 1999-10-14 Luterek, Janusz, Franciszek Installation d'epuration de gaz
EP2742987A1 (fr) * 2012-12-14 2014-06-18 Team Kantola Service Oy Dispositif de nettoyage d'une canalisation d'air d'échappement et unité de séparation de poussière pour un réseau de gaines d'air d'échappement
CN111330396A (zh) * 2020-03-14 2020-06-26 安徽恒顺生产力促进中心有限公司 一种高效烟气净化除尘装置及其工作方法

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